Ventilated armature.



No. 831,625. PATENTED. SEPT. 25, 1906.

J. F. MQELROY. VENTILATED ARMATURE.

APPLIGATIOH FILED AIPB. 18, 1905.

lnJitqa 585 c-L I'qve 01: x1 AW 1 771 h a m P :1 M 1 9%.

' UNITED STATES PATENT OFFICE.

JAMES F. MCELRQY, OF ALBANY, NEW Y RK; assionsa ro CONSOLIDATED CAR HEATING COMPANY; OF ALBANY, 'NEW roan, A conromvnon OF WEST VIRGIN IA.-

VENTILATED ARmATun EJ- Specification ofLettex-s.l'atent..

Patented sent. as, 1906.

i nm'ion naa April 18,1005. Serial No. 266,288.

To all whom it 11mg. cortccrn:

Be it known that I, James F. MoELnor, a

citizen of the United States, residi at Al-- ban y, in the county of Albany and tateof New York, have invented certain new and useful Improvements in Ventilated Armatures, of which the followufi; specification and accompanying drawings ustrate the invention ina form which I now re ard as the best out of the various forms in which it may be embodied.

This invention relates to the construction of ventilated laminated armatures in which are introduced at intervalsbetween groups of the ordinary laminae spacing-disks or lainik projections formed in them' me having lateral to provide air-channels between the groups in radial direction. 7

The invention consists in the mannerof construct' v the spacingdisks, arra them in re ation to the other-laminae, providing for the sup rt of end thrust from the bindin means w 'ch secures the whole core u on t earmature-shaft.

Eac spacing-disk is formed with a series of protuberances struck up with a spinningtoolor other convenient means and projecting from one side only of the disk, so that the opposite side has a firm bearingthrougho'ut most of its surface upon the adjacent one of the group of ordinary laminae and is pre-' vented from bending by the end thrust,while a substantially free air-channel is formed of a width equal to the amount to which the pro-v jections are offset or a width double that amount when two spacing-disks are placed with their projections in contact to give a wider channel.- The spacing-disk forming one side of the air-channel and the abutting disk forming the op )osite side are preferably thicker than the or( inary lamina: and of sufficient stiflness so that. when the lamina are made with teeth on their edges between which the inductors lic these teeth on the spacing-disks will support themselves and the teeth of tho laminae against lateral bondin; without necessitating any special formation Uljllt teeth of the spacing-disks. lrcl' erably the sparing-disksof a set will be duplicates, and (:ltll disk is s vmnn-tru-al on op posite sides of the ke \'wa v which is formed in it. so that the disks may face in'eiiher di rection. and when two of them are uppos'ml contact. Between the .of the disk and bearing against an -o 1 their projections will always abut, thus enabling either single-width or double-width air-channels to "be formed with a 'single p at.

tern of lisks. This alsotbrin Tgs the SPHQID%- pro ections in the same angu at and radia positions insuccessive disks, so-that all the points of pressure are inline. .60 Of the accompanying drawings, Figure 1v representsan axial section of an armature construction embodying my invention. Fig. 2rrepresents afface viewof one of the spacing t The saniereferenoe'characters' indicate the same" arts in both views.

-101s the central armature-shaft; v 1111 are the ordina laminzeformedwith teeth 12 on theiredges tween which lie the jo inductors and arranged groups or sections by side in solid gl il'oups, are located spacing-disks 13, on wine I prefer to form of several laminae lying teeth 14, similar to the teeth 12, for affording 7 lateral supportto thelatter, each spacingdisk being formed with severalspacing p'rojections 15 15, extending one side only PP d1sk.16, these pro ections be ng cup-like depressions formed with a spinning tool or in any other suitable manner and made without breaking the continuity of the disk, so that the pro ection. is of maximum strength: to bear strain without collapsing. These pro-- '8.5 jections extend from one sideonly of the disk and occupy but a small portion of the total surface, so that the opposite side has a broad firm bearing against the adjacent lamina 11. There is therefore no tendency to, bend the spacing-disk between its pro ections. .The spacing-disks 13 and their abutting disks 16,

forming opposite sides of the radial air-channels, are preferably made thicker than the or-' dinary lamina ll. being of suiiicient stifl'nosstoail'ord lateral sup )ort to the teeth 1'. from tlu-lmses of the tooth H and prevent the latter from bonding without requiring any actual snpp across tho intervening space which womd obstruct the air-outletslwtwm'li too the inductors. The opposed disk Hi may lua plain disk'wilhout spacing projections, or it may lw provided with projections l5"siniilat-1o the projections 15am! abut-ting the lattor. as shown in tho louor part of Fig. l. \\'lll('ll gives an air-channel of extra width.

i This channel is entirely unobstructed except b y the spacing projections and affords a minimum of'frie-tion to the outward passage of the air.

The several disks or laminae- 11 13 16 are formed with a iertures 17 near the shaft, separated from the shafthole 18 by a continuous ring of metal 19, in which the keyway or notch 20 is formed, and sep'ara t-cd from each other by connecting arms 21, of metal, whereby the strain from thekey is transmitted equally to all parts of the outer body of the disk. These apertures together make lon itudinal air-channels communicating with the radial air-channels formed by the spacing-disks. The edges of the notch 20 form a keying member on the margin of the shaft-hole 18. Between eacli spacing disk 13 and its abutting disk 16 I ma interpose a spacing-washer 22 immediate adjacent the shaft 10 and of a width equal to the width of the air-channel for taking the thrust of the end nut or other locking means which holds together t-hGgWVllOlt-B armature-core and largely relieving the spacing-disks of this strain.

This construction of armature rovides for increased strength of s acers, wi e and-little obstructed air-channe and the necessary amount of iron and close rouping of laminae which is required for the best-magnetic ro erties of the armature and also a or s reater solidity of the whole core than has eretoforebeen attained in armatures having equal facilities for ventilation. i

Fig. 1 shows how either a single-width .or a double-width air-channel may be formed in the same armature, if desired, with s acing-disks which are duplicates of each 0t ier. As seen in Fig. 2, the projections are symmetrically laced on opposite sides of the keyway 20 and are at the same radial distances from the center in any two disks, since'the disks are du ilicates. Hence the disks may be assembled facing in either direction and will match up their projections so as to form the double-width space as shown in the lower part of Fig. 1. This of course disenses with the necessity of having a pluralitv of patterns of disk in the same armature when different widths of air-space are desired. It also brings the spacing projections in the samcangular and radial positions in successive disks whether single or double, so that all the oints of )IGSSUR are in continuous parallel lines. I' t is of advantage to make the projections of .frustal form, as shown, for the sake of stiffness and proper abutting surface in the projections.

1 am aware that various kinds of} ulcers for forming ventilated armaturcs are a ready known, including tongues of metal tur'ned edgcwise across the planes of the dis'kp disks .in sockets on the disks, 820.; but all such devices either lack the strength and solidity of my construction, are subject to greater viheat transmission, or are less simple, less easily assembled, and more expensive to build, and I am not aware of any disks ca a ble of rigidassembly on the shaft in cit ier sin le-width or double-width air-passages.

tat I claim as new, and desire to secure by Letters Patent, is

I. A ventilated armature comprising a se ries of magnetic core-sections composed of a plurality of the usual plain laminae in solid contact, and a series of spacing-disks interposed between said core-sections and formmg radial air-channels, each s acing-disk havin formed therein on one si e only a series o isolated cup-aha ed s acing pro'ections continuous with t e be y of the isk and abutting an opposite disk, said projections being sufficiently stitfto support the axial pressure, the reverse 'plane side of said spacin -dlsk seating solidly againstthe adjacent p ain lamina.

2. A ventilated armature comprising a shaft, a luralitv of core-sections each com s'ed of a multiplicity of abutting plain agnetic lamina'e,s acing-disks between said sections having sti thrust-resisting cketlar and radial ositions in successive spacmg-disks, the 0th plane and seating solidly against the coresections, together with means for keying said thereon.

3. A ventilated armature comprising coresections composed of plain laminae, andone or more air-channel spacers between ad acent sections composed of a pair of disks plane on the sides abutting the core-sections abut each other in the reposite sides whic s ective disks, said disks with their pro ect1ons being stiff and self-supporting so as to resist the axial pressure. i

4; A. spacin -disk for ventilated armatures comprising a sheet-metal plate having a cen tral aperture for the armature-shaft and an adjacent marginal keying member, said disk being plane on one face and formed on; the

other face with integral frustal projections distributed symmetrically on both sides of the diameter through said keying member and adapted to abut the projections on a duplicate opp()sitel -'-'facing dis V In testimonv whereof I have hereunto setmy hand, witnesses, the 8th day of April, 1905.

- JAMES F. MCELROY.

Witnesses:

' BEL'LAII. CARLE,

having projections facing alternately in oppo ite dn'cct ions. sepa rate spacer-blocks he d Enxi-zsr D 'J xsax.

bration, obstruction of air-currents, or faulty disks to the shaft to prevent their turning and having. integix'al projections on their opshaped projections on one side only, a utting an opposite disk and located in the same ani r sides of said disks being in the presence of two subscribing i2 5 

